<template>
  <div>
    <!-- 导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 列表 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template v-slot="scope">
            <!-- 一行24列 -->
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : ' ', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染耳二级权限 -->
                <el-row
                  :class="[i2 === 0 ? ' ' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <pre></pre>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template v-slot="scope">
            <el-button
              sizi="mini"
              type="primary"
              icon="el-icon-search"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              sizi="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              sizi="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>

      <!-- 添加角色的对话框 -->
      <el-dialog
        title="添加角色"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed"
      >
        <!-- 内容主题区域 -->
        <el-form
          :model="addForm"
          :rules="addFormRules"
          ref="addFormRef"
          label-width="100px"
        >
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRole">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 编辑角色的对话框 -->
      <el-dialog
        title="编辑角色"
        :visible.sync="editDialogVisible"
        width="50%"
        :before-close="handleClose"
        @close="editDialogClosed"
      >
        <el-form
          :model="editForm"
          :rules="editFormRules"
          ref="addFormRef"
          label-width="100px"
        >
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRoleInfo">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>


  </div>
</template>
<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children',
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 档期那即将分配权限的角色id
      roleId: '',
      // 控制添加用户对话框的显示与隐藏
      addDialogVisible: false,
      addForm: {
        roleName: '',
      },
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '角色名称的长度在3~10字符之间',
            trigger: 'blur',
          },
        ],
        roleDesc: [
          {
            message: '请输入角色描述',
            trigger: 'blur',
          },
        ],
      },
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '角色名称的长度在3~10字符之间',
            trigger: 'blur',
          },
        ],
        roleDesc: [{ message: '请输入角色描述', trigger: 'blur' }],
      },
      // 控制修改角色的对话框的显示与隐藏
      editDialogVisible: false,
      
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      //   console.log(res.data);
      this.rolelist = res.data

      // console.log(this.rolelist)
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮，添加新角色
    async addRole() {
      //   this.$refs.addFormRef.validate(async (valid) => {
      //     if (!valid) return
      // 可以发起添加角色的网络请求
      const { data: res } = await this.$http.post('roles', this.addForm)
      if (res.meta.status !== 201) {
        this.$message.error('添加角色失败！')
      }
      this.$message.success('添加角色成功！')
      // 隐藏添加角色的对话框
      this.addDialogVisible = false
      // 重新获取角色列表数据
      this.getRolesList()
    },

    // 展示编辑角色对话框
    async showEditDialog(id) {
      // console.log(id);
      const { data: res } = await this.$http.get('roles/' + id)

      if (res.meta.status != 200) {
        return this.$message.error('查询角色信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    handleClose() {},
    editDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 编辑角色并提交（点击确定按钮时进行表单的预校验）
    editRoleInfo() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc,
          }
        )

        if (res.meta.status != 200) {
          this.$message.error('修改角色失败！')
        }
        this.$message.success('修改角色成功！')
        // 隐藏修改角色的对话框
        this.editDialogVisible = false
        // 重新获取角色列表数据
        this.getRolesList()
      })
    },
    // 删除角色信息
    async removeRoleById(id) {
      // console.log(id);
      // 根据Id删除对应的用户信息
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 concel
      // console.log(confirmResult);
      if (confirmResult != 'confirm') {
        return this.$message.info('已经取消了删除')
      }
      // console.log('确认了删除');

      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status != 200) {
        return this.$message.error('删除角色失败！')
      }
      this.$message.success('删除角色成功！')
      this.getRolesList()
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      // console.log('确认了删除');

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }

      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }

      // 把获取到的权限数据保存到 data 中
      this.rightslist = res.data
      // console.log(this.rightslist);

      // 递归过去三级节点 的 id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },

    // 通过递归的形式,获取角色下所有的三级权限的id,并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 看它是否包含三级属性
      // 如果当前 node 节点不包含 children 属性,则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach((item) => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }

      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  },
}
</script>
<style scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>